Meldonium-d3 is the deuterated form of Meldonium. Meldonium is a cardiovascular protective agent that competitively inhibits BBOX1 and OCTN2. The IC 50 value of Mildronate against human recombinant BBOX is 34-62 μM, and the EC 50 value against human OCTN2 is 21 μM. Meldonium is a fatty acid oxidation inhibitor.